<?php
/*
 *      osfields.php
 *      
 *      Copyright 2010 Vitaliy Rakitin <virak@ukr.net>
 *      
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *      
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *      
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 */

require_once($_SERVER['DOCUMENT_ROOT']."/classes/System/osfield.php");
require_once($_SERVER['DOCUMENT_ROOT']."/classes/System/iobserver.php");
//require_once($_SERVER['DOCUMENT_ROOT']."/classes/DB/DB.php");
//require_once($_SERVER['DOCUMENT_ROOT']."/classes/system.php");
//require_once($_SERVER['DOCUMENT_ROOT']."/classes/System/osmetafields.php");

class osfields implements iobserver {
	
	private $fields = array();
	private $meta;
	//private $observers = array();
/*	
	function addfield($field = null) {
		if (!$field) {
			$field = new osfield();
		}
		$field->addObserver($this);
		$this->fields[] = $field;
		return $field;
	}
*/	

/*
	function addObserver($observer) {
		$this->observers[] = $observer;
	}
*/
	
	function observable_before_changed($sender, &$value) {
		foreach ($this->fields as $field) {
			${$field->meta->name} = $field;
		}
		eval($sender->meta->beforechange);
	}
	
	function observable_after_changed($sender, &$value) {
		foreach ($this->fields as $field) {
			${$field->meta->name} = $field;
		}
		eval($sender->meta->afterchange);
	}
	
	function __construct($meta) {
		$this->meta = $meta;
		foreach ($this->meta->getall() as $metafield) {
			$this->fields[$metafield->uuid] = new osfield($metafield);
			$this->fields[$metafield->uuid]->addObserver($this);
		}
	}

	function byuuid($uuid) {
		if (array_key_exists($uuid,$this->fields)) {
			return $this->field[$uuid];
		} else return null;
	}
	
	function byname($name) {
		foreach ($this->fields as $field) {
			if ($field->meta->name == $name) {
				return $field;
			}
		} 
		return null;
	}
	
	function getall() {
		return $this->fields;
	}
}
?>

